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Moroso new Ultra 40 Race ignition wire sets are the most powerful and RFI/EMI-resistant wires available for racing today. Features of these 8.65mm wires include a KEVLAR® core that's four times stronger than Aramid cores, a class-leading 40 ohms of resistance per foot, nickel copper alloy conductors for superior spark energy transfer, an extra-thick EPDM layer for greater dielectric strength, high-temperature silicone boots that can withstand heat up to 600 degrees, and locking stainless steel plug terminals. Plus, their closely woven fiberglass, silicone-impregnated insulation provides up to 8,000 extra volts of protection, and their extra-thick diameter extends wire life by adding additional insulation against heat, chaffing, and contaminants.

Fit great on 66 Vette under headers

Summit Racing Verified Purchase

MOR-73616

These fit my big block Pro Street Vette under the Hooker Super Comp side-pipe headers very well. Super nice appearance and the added insulators and plug wire cylinder markings are a nice touch. Expensive but worth the money for a high performance engine with MSD ignition and aluminum heads with raised exhaust ports.